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These udev netlink messages are supposed to be sent with the credentials (process ID, user ID, group ID) of the sending process. libudev will not accept messages without this. The SO_PASSCRED option is used to enable receving credentials, as described in the man page for Unix domain sockets on Linux.
。关于这个话题，heLLoword翻译官方下载提供了深入分析
Digital access for organisations. Includes exclusive features and content.，更多细节参见51吃瓜
第十五条 除合同另有约定外，抵押人应当对抵押船舶进行保险；未保险的，抵押权人有权对该船舶进行保险，保险费由抵押人负担。